Stove.



e. 'SMETH.

STOVE.

APPLICATION FILED JUNE 15; NH.

1 99,252 Patented Oct. 3, 1916.

2 SHEETS-SHEET Wfnesses g 3 g!" 6. SMITH.

STOVE.

APPLICATION FILED JUNE 5. 19H.

Patented Oct. 3, 1916.

2 SHEET-S'HEET 2.

NTTED STATES PATENT OFFICE.

GRANT SMITH, F TORONTO, ONTARIO, CANADA.

STOVE.

Specification of Letters Patent.

Application filed June 15, 1911. Seria1No.G33,285.

-' and exact description of the same.

The invention relates to improvements in stoves, as described in the following specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially in the novel construction and arrangement of parts, whereby the gases of combustion are con ducted from the fire pot through an annular chamber inclosing a central heating chamber. r

The objects of the invention are, to obtain the maximum heat radiating surface, to economize in the use of fuel, and to devise a stove which may be utilized wholly for heating purposes, or converted to a combination heating and cooln'ng stove.

In the drawings, Figure 1 is a front elevational view of a stove constructed in accordance with this invention shown partly in vertical section. Fig. 2 is a vertical sectional perspective detail through the rear of the stove. Fig. 3 is a horizontal sectional view through the line ab Fig. 1. Fig. 1 is a sectional perspective detail of a portion of the stove casing and grate. Fig. 5 is an enlarged plan view of the center cone grate. Fig. 6 is a perspective detail of a portion of the draft control damper'and support and a portion of the grate.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 is thebase portion of the stove supported on suitable legs 2.

3 is an annular ring formed integral with the inner ends of the radially arranged ribs 4 projecting inwardly from the ring 15 resting on the base 1.

5 is the fire pot preferably formed in the shape of a frustum'of a cone and having a lateral flange 6 adjacent to the bottom resting upon the ring 3.

The fire pot 5 is formed with a plurality of protuberances 7 on its exterior, said pro- 7 tuberances having upwardly and outwardly sloping orifices 8 forming exit openings for the gases of combustion.

9 is an annular sha'pedgrid rigidly supported from the basel below the fire pot 5, the outer circumference of said grid being about the same diameter or slightly larger than the diameter of thebottom of the fire pot. 1

10 is a grate ring rotatably supported upon the'grid 9 and having the radial bars 11 preferably arched and hollow on the underside. The bars of the ringlO correspond in number to the bars of the grid 9 and are adapted on the rotation of the ring to close the openings between the grid bars.

12 is a cone shaped grate supported upon the upwardly extending flange 13 of the grid 9. and extendingupwardly' into the fire box.

141 is a damper ring rotatably supported upon the ribs 4 between the inwardly extendingring portion 15 resting on the base and the rigid ring 3, said damper having a plurality of openings therethrough corresponding in number and size to the ribs 4: so that the said ribs willclo se the openings.

A casing comprising the shells 16 and 241 extends upwardly from the base to the top portion of the stove. The shell 16 incloses an annular chamber 17 around the fire pot 5 and is provided with suitable doors 18..

19 is a ring supported upon the shell 16 and the top of the fire pot 5 and having an inwardly extending drop flange 20 projecting inwardly from the inner edge of the fire pot. s

21 and 22 are annular flanges on the ring 19 extending upwardly substantially in line with the shell 16 and fire pot 5 respectively.

The ring 19 is provided with a plurality of orifices 23 arranged between the said vertical flanges 21 and 22. 'The shell 2a which is preferably of sheet metal is held in place by the flange 21 of the ring 19. I.

25 is an annular shell resting on the ring 19 and spaced from the shell 24. being held in place by the flange 22, said shells inclosing an annular chamber forming an exten- Patented Oct. 3, 1916.

sion of the chamber 17, the inner shell form- 7 ing a central heat chamber.

26 is an annular ring resting upon the upper ends of the shells 24: and 25 and having a plurality'of orifices 27 therethrough communicating with the chamber 28 between Said shells. The inner and outer walls 29 V flange 36 formed on its inneredge.

V the ring 37 dished shape in cross section and completing the chamber 31. V

34' is the smoke pipe ferrule formed integral with the ring 33 and arranged centrally above the extension portion of the baffle 32. The several sections herein described as forming the body of the stove are suitably cemented and secured together'toform gas tight joints to prevent the escape of coal gas when the stove is in use. I

35 is an annular plate resting on the depending flange 20 and having a depending 37 is a ring preferably formed in the shape of an inverted frustum of a cone having a lateral flange'38at the upper edge resting'u'pon an inwardly extending flange 39 fromthe ring 33 and having an inwardly extending flange 40 at the bottom edge. I

41 are a plurality ofslotted openings'in 42 isa ring damper fitting the inner face of the ring 37 and rotatably suppported thereon.

43 is a metal cylinder having an outwardly extending flange '44'at the upper end adapted to rest on the depending flange 40 of the ring 37 and a flange 45 at the bottom resting in the depending flange 36 of'the plate 35. p

46 is an annular recess formed at the upper end of the cylinder 43.

47 is a circular plate resting in the recess '46 and inclosing the top of said cylinder.

48 is a perforated crown piece resting on the top of the ring 33 and covering the and the central cylinder '43 is lifted upwardly by means of a suitable handle .or grip a sufficient distance to allow the plat:- ing of the fuel within the fire-pot, the door 49 being opened. When sufficient fuel for properly lighting the fire has been arranged the cylinder 43 is returned and the top again placed in position and the fire is then lighted. The air entering the base of the stove through suitable dampers passes through the bars of the cone shaped grate 12 and through the fire, the gases of combustion passing outwardly through the orifices 8 in the fire pot. The hot gases entering the chamber immediately surrounding the fire pot pass upwardly through the perforated ring 19 and chamber 28 and are deflected outwardly by the bafile plate 32. The baffle plate 32 being arranged to extend completely across the chamber 31 at the back of the stove and immediately beneath the smoke pipe opening prevents the said gases from taking a short cut to the fiue, thereby effecting an even distribution 7 and a more effective heating of the radiating surfaces and thereby giving the greatest possible heating efficiency.

When the stove is used exclusively as a heater, the arched opening 51 at the back of the stove is left open and the air is drawn through said opening and circulated through the chamber 50 passing upwardly through the perforated ring at the top of said chamber and out through the perforated crown. A very large heating area is thus exposed tothe air in circulation as the gases of combustion are circulated through an annular flue the full diameter of the stove in contact with the air at both sides.

When the cylinder 43 is in place the stove may be used as a self feeder and a supply of coal contained within said cylinder, such supplynot interfering in any way with the circulation of air in the chamber50.

'In using the stove for cooking purposes the cylinder 43 is lifted out through the' top and the plate 47 is then placed in position to close the opening immediately over the fire and a suitable plate maybe placed in the ring 37 to close in the oven space thus formed. A suitable closure 52 may be placed to close the arched opening 51. The chamber 50 is thus very quickly converted into a spacious oven having the fire immediately beneath it and the hot gases circulating completely therearound except of course atvthe door opening in the front of the stove. Then the stove is used in'this manner the ring damper 42 will be closed. The ring grate 10 fits very closely under the bottom end of the fire pot so that very little air will pass through the: fire from the joint and this grate is arranged to close the openings in the grid 9 for the major portion of the "time, it being in practice only used as ashaker. The bars of the said ring are preferably arched as described to present as large a surface to the air as possible to prevent undue heating.

As the top of the fire pot is closed in, the main flow of air passes between the bars of the cone grate and the draft is thus carried directly through the fire to the openings in the side walls of the fire pot. The hot gases enter the chamber immediately surrounding the fire pot and flow upwardly as described, dispensing the heat against a very large radiating surface both internally through the inner chamber 50 or oven and externally.

The bafiie plate 32 is very important as it not only directs the gases into active contact with the exterior Wall of the stove but prevents the hot gases from taking too direct a course to the smoke pipe thus insuring a .uniformlyheated surface throughout the exposed area of the stove.

A stove such as described may be very readily converted from a heating stove to a combination heater and cooker and in summer may be very quickly converted to use with gas, suitable gas rings 53 and 54 being placed within the fire pot and within the chamber 17 and the oven thus heated very quickly.

A stove such as described has numerous advantages over the stoves now commonly in use and presenting such a large heating surface it will efi'ect a very great saving in the consumption of fuel. Further the stove presents a very ornamental appearance.

What I claim as my invention is 1. A stove, comprising, a base, a fire pot having orifices in the side walls for the escape of the gases of combustion, means closing the top of said fire pot, a shell extending upwardly from the closed top of said fire pot and inclosing a heat chamber, and a shell extending upwardly from the base and encircling the fire pot and casing extending therefrom and forming a smoke passage therearound.

2. A stove, comprising, an annular base portion, a fire pot supported on said annular base portion and having openings through the side walls, a grate arranged beneath said fire pot, a casing surrounding said fire pot and supported on the base portion and extending upwardly above the top of said fire pot, an inner shell spaced from said outer casing'and rising from the top of said fire pot and forming with the outer casing an annular smoke passage and inclosing a heat chamber, means for closing in the top of said fire pot, a damper arranged in the top of said heat chamber, an air duct leading through said smoke passage into said heat chamber at the bottom, and means for closing said air duct.

8. A stove, comprising, an annular base portion, a fire pot supported on said annular base portion and having openings through the side walls, a grate arranged beneath said fire pot, a casing surrounding said fire pot and supported from the base portion and extending upwardly above the top of said fire pot, an inner shell spaced from said outer casing and rising from the top of said fire pot and forming with the outer casing an annular smoke passage and inclosing a heat chamber, a hollow ring sup ported on theupper ends of said annular casings and having openings communicating with the annular smoke passage and a flue at one side thereof, and an annular baflie plate arranged within said hollow ring and extending completely thereacross be neath said smoke flue.

4. A stove, comprising, a base portion, a fire pot in the form of a frustum of a cone supported on said base portion and having openings through the side wall, a grate at the bottom of said fire pot, a member inclosing the top of said fire pot, a cylindrical shell extending upwardly from said fire pot a cylindrical casing encircling said fire pot and extending upwardly and encircling said shell and forming therewith an annular smoke passage surrounding a heat chamber inclosed within the inner shell, a door opening through saidcasing and inner shell, a door closing said opening, a cap extending over the top of the annular smoke passage having a smoke flue, and means for closing the top of said chamber.

5. A stove, comprising, a base portion, a fire pot in the form of a frustum of'a cone supported on said base portion and having openings through the side wall, a grate beneath the bottom of said fire pot, a cylindrical shell extending upwardly from said fire pot, a cylindrical casing encircling said fire pot and extending upwardly thereabove and with said shell forming an annular smoke passage around a heat chamber, a cap extending over the top of said annular smoke passage having a smoke flue therethrough, a ring extending inwardly from the top of the fire pot, a ring extending inwardly from the top of the inner shell, a cylinder extending between said rings and supported thereby within said heat chamber and forming a fuel passage through said heat chamber, and a lid adapted to close the top of said cylinder.

6. In a stove, in combination, a base portion, a circular perforated fire pot supported on said base, a grate arranged beneath saidfirepot, an annular casing surrounding said fire pot, a perforated ring resting on said casing and fire pot, a removable top adapted to close thetop of said fire pot, a' pair of cylindrical shells supported on said ring and extending upwardly therefrom and inclosing an annular smoke passage, said annular smoke passage. communicating with the passage between the aforesaid annular casing and said fire pot through the openings in said perforated ring, a heat chamber inclosed by the inner one of said shells, a hollowring resting on the top of said shells and forming a smoke passage and having a smoke flue therethrough, and means 'for closing the top of said heat chamber.

7'. A stove, comprising, a base portion, a'

circular perforated fire vpot supported from said base, a grate arranged beneath said fire pot, a ring resting on the base and encircling the lower end of the fire pot, said ring having a plurality of openings therethrough, a damper ring rotatably supported upon the aforesaid ring, an annular casing supported on said ring outside of the openings therethrough and inclosing an annular space around said fire pot, a pair of annular shells rising from said annular casing and fire pot and inclosing an annular smokepassage, a hollow top supported .on said shells and forming a smoke passage having a smoke 20 flue therethrough, and means for closing in the top of the fire pot.

Signed at the city of Toronto, county of York, Ontario, Canada, this 10th day of May, 1911.

GRANT SMITH.

- Witnesses: H. DENNISON, I E; HERON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

